What you want is the Avatar trilogy. I'm fairly sure they are intended to be a prequel to Baldur's Gate.

I read them many years ago, and its the reason I prefer FR to the other D&D stuff.

The Drizzt ones might also be worth a look, I think there are loads of those tho (I remember there being three trilogies or something?)

http://www.amazon.com/Shadowdale-Tantras-Waterdeep-Forgotten-Trilogy/dp/B001LIVUN6/ref=sr_1_6?ie=UTF8&qid=1286402995&sr=8-6

I recommend the Cleric Quintet series of books. Those were always my favorites, more so than the Drizzt series.

Not only is it a great series, but the main character of the Cleric Quintet is a minor/supporting character in some of the later Drizzt books, so that helps provide some background into that.

BG SPOILER...



He also makes an appearance in Candlekeep in BG1

Seriously, read this:

http://www.amazon.com/Heroes-Die-Matthew-Woodring-Stover/dp/0345421450/ref=sr_1_1?s=books&ie=UTF8&qid=1286405081&sr=1-1

You will forever wish you could play a campaign here.